Nut-lock.



PATENTED JULY 7, 1908.

J. H. WESSON.

NUT LOCK.

APPLICATION FILED O0T.1B, 1907.

JOSEPH H. WESSON, OF SPRINGFIELD, MASSACHUSETTS.

N UT-LOCK.

Specification of Letters Patent.

Application filed October 18, 1907.

Patented July '7, 1908.

Serial No. 398,072.

To all whom it may concern:

Be it known that I, JOSEPH H. WESSON, a citizen of the United States ofAmerica, residing at Springfield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in Nut-Locks,of which the following is a specification.

This invention relates to improvements in nut-locks and has for itsobject to provide a device that is simple in construction and one thatwill effectually prevent the loosening of the nut when the same isfirmly rotated against an abutment; a further object of the invention isto provide a device that will permit the nut to be readily turned by thehand of the operator against the abutment, and during this operation thenut-locking means is brought into use. l/Vhen the nut is in thisposition a slight additional rotary movement only is required to beimparted to the nut to bring it into a firm locking position against theabutment whereby the parts are securely bolted together by means of thebolt and nut a further object is to provide a device that can be used ina space that will not permit a wrench to be conveniently used.

In the drawings forming part of this application,Figure 1 is a plan viewof the parts when in a locked position. Fig. 2 is a verticallongitudinal section of the same on the line 22 of Fig. 1, and Fig. 3 isa detailed perspective view of the parts before assembling. Fig. 4 is aplan view of the sleeve, bolt, and nut assembled. Fig. 5 is a horizontalsectional plan view on the line 5 5 of Fig. 4 looking down.

Referring to the drawings in detaila and b designate pieces that arerequired to be bolted together and are shown merely for the purpose ofclearly showing the operation of the device.

0 designates the bolt proper, the threaded shank portion d of which hasthe threads (1 cut away on opposite sides thereof, as shown at e inFigs. 2 and 4, thereby producing a mutilated thread on the bolt.

f designates a nut of the usual construction, and g a sleeve which isslitted longitudinally thereof at h and is also provided on the interiorportion thereof with a mutilated or broken thread,-the mutilated portionof which is indicated at i, and receives the threads of the shank d ofthe bolt when the sleeve and nut are placed thereon; when the sleeve andnut are 1n this position the sleeve is rotated so that the threads (1 ofthe bolt will interlock with the threads j of the sleeve 9. The rotationof the sleeve into this position produces a sector-shaped openingbetween the sleeve and shank (Z, that is to say the cut-away portions ofthe sleeve and nut are brought into registration.

76 designates as a whole the locking element which is provided with thesector-shaped prongs or fingers mformed integral therewith, and whichare slightly tapered longitudinally so that they may be inserted intothe sectorshaped openings between the sleeve and the shank portion ofthe bolt, as shown in 2 in sectional elevation and in plan view in Fig.5. This locking element is provided with a screw a threaded into theupper portion thereof, the purpose of which will be referred to later.After the prongs of the locking element it have been inserted in placebetween the sleeve and bolt, the nut is rotated by hand against theabutment a, which movement will cause the sleeve 9 to be advancedoutwardly in the opposite direction, the sleeve and nut will be lockedtogether by rea son of the inclined surface of the prongs m on the splitsleeve 9, the sleeve being also pre vented from rotating by means of theprongs of the locking element 7c, as readily understood. Only a slightadditional movement is now required with a wrench on the nut fto firmlyand securely place the nut in its final holding and locking position,which can usually be accomplished even in a very small 'space. Thelocking element 7r having thus been firmly secured to the sleeve 9, andthis sleeve having been placed in an expanded condition by reason of theinclined surface of the prongs m, m so as to firmly lock the threads ofthe nut and sleeve together, the screw n is then rotated into engagementwith the ends of the shank portion of the bolt, as shown in Fig. 2. Thepurpose of this screw is to loosen the locking element It when it isdesired to remove the sleeve and nutfrom the bolt, which operation isaccomplished by turning the screw inward so that its inner end isbrought to bear on the end of the bolt, whereby the locking element 7rwill be loosened from the sleeve and can then be readily withdrawn byhand after such loosening. Since the removal of this locking elementpermits the sleeve 9 to contract again and remove the pressure betweenthe nut and sleeve, the same can be rotated and the threads 7' thereofbrought into the mutilated or cut-away portion t of the sleeve, and whenin this position, the sleeve and nut canbe removed from the bolt 0.

WVhat I claim, is

1. An improvement of the class described having in combination with themutilated threaded portion of the bolt, a nut a split sleeve providedwith cut-away portions to receive the mutilated thread of the bolt, theexterior surface of the sleeve being threaded to receive the threads ofthe nut, and means for expanding the sleeve whereby the sleeve and nutare locked together.

2. As an improvement in nut-locks having in combination with themutilated thread of the shank portion of the bolt, a nut a split sleeveprovided with threads on its exterior surface for receiving the threadsof the nut, the interior portion of the sleeve having a mutilatedthread, the mutilated portion receiving the threads of the bolt, wherebywhen the sleeve is rotated to bring the threads of the sleeve and thethreads of the bolt into engagement, an opening will be formed be tweenthe sleeve and bolt, a sector-shaped locking element for engaging theopening between the sleeve and bolt, whereby the sleeve is locked to thebolt, said sector-shaped element being tapered, whereby when the nut isrotated against an abutment the sleeve will be ex anded and the threadsbetween the sleeve and nut locked to each other.

3. As an improvement in nut-looks, in combination With the threadedportion of the shank thereof, a nut an expansive ele ment carried by thebolt and threaded into the nut, an expanding element mounted between theexpansive element and the bolt for locking the threads of the expansiveelement and nut together, and means carried by the expanding element fordisengaging the same from the shank of the bolt.

4. Anut-locking device having in combination with the nut thereof, asplit sleeve for receiving the nut, the inner portion of the sleevebeing threaded to receive the threads of the bolt, and means engagingthe bolt and sleeve for expanding the split sleeve, and locking the sameto the nut and bolt.

JOSEPH H. ,W'ESSON.

Witnesses:

l/VM. H. CHAPIN, K. I. OLEMoNs.

